I regularly around the the Glasgow zone and fail to understand their request to squawk 2620 when I have never been transponder equipped and am flying within the vfr corridor outside their airspace.Are glasgow now asking that all aircraft be transponder capable to. Fly round airspace they do not control.I prefer to fly round their zone on a listening watch and without requesting a service in order to reduce their workload but I'll draw the line at fitting a transponder to accommodate their Atc inadequancies.I will continue to fly in uncontrolled airspace around the zone within the already onerous restrictions placed on a simple vfr pilot.I feel for the brilliant controllers at Glasgow and Scottish who face an ever increasing workload but loathe the financially motivated leaders who allow this to happen.